Lactation or dry skin?!?

Ok I'm already a mommy of 2 I never produced milk for my first. I did for my second but didn't breast feed. Now I keep feeling wettness in my bra but when I check I don't physically see wet spots. I did have VERY itchy nipples a couple days ago but that has stopped. But again today I felt the wetness but instead I found this.... It's either skin or possiable milk? It's not my bra fuzzies cause they are a blueish gray. What do you think?​​​And "most" of the skin/milk whatever it is, is where my nipple would be.